HAL575SF-K datasheet(23/36 Pages) MICRONAS

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DATA SHEET

HAL575

Micronas

Dec. 22, 2008; DSH000145_003EN

4.3. HAL575

The HAL575 is a medium sensitive latching switching

sensor (see Fig. 4–9).

The sensor turns to high current consumption with the

magnetic south pole on the branded side of the pack-

age and turns to low consumption with the magnetic

north pole on the branded side. The current consump-

tion does not change if the magnetic field is removed.

For changing the current consumption, the opposite

magnetic field polarity must be applied.

For correct functioning in the application, the sensor

requires both magnetic polarities on the branded side

of the package.

Magnetic Features:

– switching type: latching

– medium sensitivity

–typical BON: 4 mT at room temperature

–typical BOFF: −4 mT at room temperature

– typical temperature coefficient of magnetic switching

points is 0 ppm/K

– operates with static magnetic fields and dynamic

magnetic fields up to 10 kHz

Applications

The HAL575 is designed for applications with both

magnetic polarities and weak magnetic amplitudes at

the sensor position such as:

– applications with large airgap or weak magnets,

– multipole magnet applications,

– contactless solutions to replace micro switches,

– rotating speed measurement.

Fig. 4–9: Definition of magnetic switching points for

the HAL575

Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 3.75 V to 24 V,

Typical Characteristics for VDD = 12 V

Magnetic flux density values of switching points.

Positive flux density values refer to the magnetic south pole at the branded side of the package.

The hysteresis is the difference between the switching points BHYS = BON − BOFF

The magnetic offset is the mean value of the switching points BOFFSET = (BON + BOFF) / 2

Current consumption

IDDlow

BHYS

IDDhigh

BOFF

BON

Parameter

On point BON

Off point BOFF

Hysteresis BHYS

Magnetic Offset

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

−40 °C0.5

−8

−4

−0.5

°C0.5

−8

−4

−0.5

100

°C0.5

−8

−4

−0.5

140

°C0.5

−8

−4

−0.5

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